If I want to do something, I do it, even if it's not what everyone else is doing. My friends thought I was weird and sad for wearing a LiveStrong band since last July: now look at how popular it is. I wear what I like and look good in, I do my own thing, if I don't want to do something I don't. But if a friend recommended something to me and I'd never done it before, say a random sport, then I'd do it. I'd never do anything to fit in with the crowd. I'm happy to try new things, but I'll do them regardless of whether no one's doing them, or everyone's doing them.
I think you only follow the crowd if you're not comfortable being yourself.